Perforated joint valve for glass instruments



W. JUFFA PERFORATED JOINT VALVE FOR GLASS INSTRUMENTS Jan. 9, 1940.

Ailorneys.

' W/LHELM JUFFA Filed April 2, 1957 Patented Jan. 9, 1940 UNITED, STATES PERFORATED JOINT VALVE FOR GLASS INSTRUMENTS Wilhelm Jutfa, Ilmenau, Germany I Application April 2,l937, Serial No; 134,518

In Germany May 25, 1936 4 Claims.

The invention relates to liners for glass instruments for laboratory work, these liners being provided with two normal cuts of different diameters and like taper and being used for compensating the difierence in size between the bottle neck and the stopper or an attachment or the like to be fitted in the bottle neck. This liner can be easily inserted and removed.

'I'heknown liners of this type have solid walls. The invention consists in that these conical liners which can easily be inserted between the bottle neck and the stopper, are provided with a wall which has apertures at certain points, said apertures being in the form of slots or oval or round holes, or grooves. With the aid of these perforations, grooves, channels or the like provided in the wall of the liner all kinds of glass instruments can be assembled or improved. The liner according to the invention can be used primarily for converting an ordinary bottle with smooth neck into a dropping bottle. The glass. instruments hitherto known, with hermetically ground stoppers and dropping devices, required separate liquid passages in the neck of the bottle, which had to be brought into register with corresponding liquid channels in the ground-in glass stopper by turning this stopper. The bottle therefore had to be correspondingly prepared. According to the invention any bottle with smooth neck, that is without liquid channels in the neck can be used as a dropping bottle by inserting between the bottle n ck and the stopper the liner made according to t e invention, which is provided with perforations, channels and the like. In this manner the channels and thelike hitherto formed in the bottle neck are transferred to the -liner which can be easily inserted between the bottle neck and the stopper, whereas the bottle neck is or can remain smooth. The liner therefore serves a double purpose;

(1) For adapting the neck. aperture of the bottle to the size of the stopper. orattachment to be fitted therein and (2) For rendering the bottle with smooth neck andhermetically ground-in stopper adapted to be used directly as a dropping bottle.

Several of the above mentioned liners can'be inserted in the bottle neck and only theinnermost of these liners need be provided with perforations, apertures, grooves or the like.

The arrangement according to the invention is likewise advantageous when an attachment, for example an extraction apparatus, cooler, distilling attachment or the like is to be fitted in a bottle h'aving for example a wide neck. It is then possible by turning the liner according to the invention to attain either that the liquid of the attachment, cooler or the like flows into the bottle or that after correspondingly turning the liner, the flow from the attachment is interrupted and even that the filled attachment can be removed from the bottle with the liner without the liquid running out at its lower end.

Several embodiments of the invention are illustrated by way of example in the accompanying drawing in which:

Fig. 1 shows in elevation a bottle with two liners insection fitted between the bottle neck and the stopper.

Fig. 2 shows in section the inner liner of Fig. 1

I with-the stopper fitted therein.

Fig. 3 shows the stopper in section.

Fl'gs.*;4, 5 and 6 show liners in section with different kinds of perforations.

Fig. 7 shows an attachment fitted in a bottle neck with the aid of liners.

According to Fig. 1 a pluralityof liners are fitted inthe neck of a bottle I of any desired size, these liners overlapping in their longitudinal direction.

The liner 3 has, at two diametrically opposite portions perforations 5 which extend, for example, from the middle of the reducing piece to the lower end thereof. A glass stopper is insertible in the reducing piece and, as shown in Fig. 3 has, in known manner, longitudinal channels 6 and 'l' at diametrically opposite portions of its periphery. If this stopper 4 is turned so that the upper end of the slot 5 in the liner 3 registers with the lower ends of the passages 6, I in the stopper, as shown in Fig. 1, an ordinary bottle is converted into a.dropping bottle, as the left passage 6, 5 allows air to fiow into'the bottle whereas the right passage 'l, 5 allows theliquid to flow out in drops.

v Fig. 2 shows how the slot '5 of the liner registers 'with the channel 6 after the stopper has been correspondingly turned.

The perforations in the liner may be of diflerent shapes as shown in Figs. 4 to 6.

According to Fig. 4 the perforation 5 is inthe form of a slot and extends to the lower end of the liner.

The perforation may also be of oval shape as shown in Fig. 5 and situated in the middle portion of the liner.

According to Fig. 6 the liner has a hole intermediate its length and a groove 40, indicated by a dotted line.

According to Fig. 7 the stopper of an attachment, cooler, extraction apparatus, distilling apparatus or the like 2| is inserted in the bottle or glass flask 20. 22 and 23 are the liners, the inner liner 23 having an aperture adapted to be brought into register with apertures 26 and 21 provided in the stopper of the attachment by correspond ingly turning the liner 23. 25 is a partition in the stopper of the attachment, said partition extending between the apertures 26 and 21.

In the position shown in Fig. '7 the liquid can flow out of the attachment into the flask along the path indicated by the arrows. If the liner 23 or the attachment is turned until the holes 26, 21 of the attachment and the aperture of the inner liner 23 respectively are no longer in register, the flow of the liquid is interrupted. The filled attachment 2| can then be removed from the bottle with the inner liner without any danger of liquid flowing out of the lower end of the attachment.

I claim:

1. In combination, at least one frustro-conical liner adapted to be inserted into a conical opening of a container and consisting of glass, said liner having an exterior ground surface and an interior ground surface, said surfaces being concentric and extending over substantially the same portion of the length of the liner, said liner having two separate passages formed therein, and a stopper having a conical outer surface adapted to engage the interior. surface of said liner, said stopper having two separate passages formed therein which are adapted to communicate with the first-mentioned passages in a predetermined position of said stopper.

2. A device for interconnecting a container and a tubular member, said device comprising a plurality of frustro-conical liners consisting of glass, each of said frustro-conical liners having an exterior ground surface and an interior ground surface, said surfaces being concentric and extending over substantially the same portion of the length of the liner, said liners being adapted to telescope each other in step formation, the bottom liner being adapted to be inserted into said container, the interior surface of the top liner being adapted to engage said tubular member, the exterior surface and the interior surface of each liner being adapted to establish an air-tight connection, whereby said tubular member and said container are interconnected in an air-tight manner, the cross-section of said container being reduced by the liners to any desired size without substantial elongation of the container, the bottom liner having at least two separate opposed passages formed therein which consist of flat axially extending grooves reaching to the end of the liner to be in communication with the interior of said container, the other liners having at least one passage formed therein which communicates with at least one of the passages in the bottom liner in a predetermined position of the liners.

3. In glass instruments for laboratory work, a device for connecting the interior of a container with a space, said device comprising at least two members consisting of glass, one of said members having an exterior ground frustro-conlcal surface and an interior ground frustro-conical surface. the other one of said members having at least one ground frustro-conical surface adapted to engage the interior frustro-conical surface of the firstmentioned member, said members being adapted to telescope each other in step formation, said frustro-conical surfaces being concentric and extending over substantially the same portion of the length of the members, whereby the two members are interconnected in an air-tight manner, each of the two members having at least one separate passage formed therein which is adapted to communicate with the passage of the other member in a predetermined position of the two members, one of said passages communicating with the interior of said container, the other one of said passages communicating with said space.

4. In combination, at least one liner having an aperture formed therein, a glass flask having means engaging said liner, a hollow attachment comprising a hollow stopper removably fitting into said liner and having an inner partition and at least two apertures formed therein and situated on opposite sides of said partition, the apertures in said stopper registering with the aperture in said liner upon the rotation of the liner to a predetermined position relatively to the stopper to form a continuous passageway between the interiors of the attachment and the flask, said passageway being interrupted when the liner is moved away from said position and the apertures in said stopper are out of registry with the aperture in said liner.

JUFFA. 

